1066403 has 4 divisors (see below), whose sum is σ = 1148448. Its totient is φ = 984360.

The previous prime is 1066399. The next prime is 1066409. The reversal of 1066403 is 3046601.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1066403 - 2² = 1066399 is a prime.

It is a super-2 number, since 2×1066403² = 2274430716818, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1066409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41003 + ... + 41028.

It is an arithmetic number, because the mean of its divisors is an integer number (287112).

2^1066403 is an apocalyptic number.

1066403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1066403 is a deficient number, since it is larger than the sum of its proper divisors (82045).

1066403 is an equidigital number, since it uses as much as digits as its factorization.

1066403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82044.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1066403 is about 1032.6679040234. The cubic root of 1066403 is about 102.1661715315.

The spelling of 1066403 in words is "one million, sixty-six thousand, four hundred three".